I would guess to save money on costs and administration.
Much easier to crdit points to your account which can be scanned by the retailer to the amount of credit in your name.
Just guessing mind.
Nokia 8 vs Galaxy S8
Best new design books 2017: From vintage infographics to the the psychology of type
iMac 21.5-inch (2017) review
Nokia 8 : design, caractéristiques techniques, date de sortie